Hoisting mechanism.



PATENTED MAY 2, 1905. R. F. SCOTT & P. MULLEN.

[NYE/ T083 064. 4.50;

ATTORNEY.

2 SHEETS-HEET 2.

HOISTING MECHANISM.

APPLIOATION IY'ILED DEC. 10, 1904.

WITNESSES NITED STATES Patented May 2, 1905.

PATENT OEEIcE.

ROBER" F. SCOTT AND PETER MULLEN, OF PHILADELPHIA, PENNSYL- VANIA, ASSIGNORS TO EDWIN HARRINGTON, SON AND COMPANY, INCORPORATED, OF PHILADELPHIA, PENNSYLVANIA.

HOlSTlNG MECHANISM.

SPECIFICATION forming part of Letters Patent No. 788,606, dated May 2, 1905,

Application filed December 10, 1904. Serial No. 236,309.

To all whom it ran/y concern.-

Be it known that we, ROBERT F. SCOTT and PETER MULLEN, citizens of the United States, and residents of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain Improvements in Hoisting Mechanism, of which the following is a specification.

This invention has as its leading object the production of an improved hoist that is simple, compact, and durable in construction, having parts that are readily constructed, assembled, and dissociated, and providing, movements that are simple, efficient, and low in the frictional resistance to be overcome in doing the work.

The nature and characteristic features of our improvements will more fully appear by reference to the following description and the accompanying drawings, in illustration thereof, of which Figure 1 represents a vertical sectional view taken through the axis of a hoist made in accordance with our invention. Fig. 2 represents a side elevation of part of the hand chain-wheel or power-sheave and connections therefor. Fig. 3 represents a side elevation of the mechanism with a casing member removed and a spur-wheel broken to show the gear-train, and Fig. 4 represents a side elevation of the mechanism with parts broken away to show the clutching-gears and parts coacting therewith.

As shown in the drawings, the frame members 1 and 2 have j ournaled in the bearings 1 and 2 thereof the swivel-block 3, which engages the hook 41 to provide a support for the mechanism.

The load-sheave 5 has the hubs 6 and 7 projecting therefrom journaled in the respective bearings 8 and 9 of the frame members. On the hub 6, which extends through the bearing 8, is sleeved a spur-wheel 10, which.

. is fixed to the hub and sheave by the key 1 1.

In gear with the spur-wheel 10 are the pin ions 12, which are ournaled on the spindles 13. The spindles 13 have their inner ends supported in the bearings 14 of the frame member 1 and their outer ends in bearings 15 of a casing member 16, which coacts with the frame member 1 to incase the gear-train. Fixed to the pinions 12 and revolving therewith on the spindles 13 are the spur-Wheels .17, which are in gear with the pinion 18, fixed by a key 19 on the shaft 20.

The shaft 20 passes through and is journaled in the load-sheave 5 ancf the hubs 6 and 7, fixed thereto, the end of the shaft adjacent to the gear-train. being journalcd in the hearing 21 of the casing member 16. The opposite end of the shaft 20 extends through the casing member 22, which is fixed to the frame member 2 to inease and support the clutching mechanism. Within the casing member 22 is the frictional clutching-disk 23, having a sleeve 24], which is fixed to the shaft 20 by the key 25, the sleeve extending on the shaft through the casing member. Journaled on the sleeve 24 is a clutch-wheel comprising a hub 26, which extends through and is ournaled in the bearing 27 of the casing member, and a disk 28, which frictionally engages or clutches the disk 23 through the leather 29. On the sleeve 24 is a worm 30, which engages the hub 31 of the power-sheave 32, operated by the hand-chain 32. the power-sheave inwardly 011 the worm jams its hub 31 against the clutch-wheel hub 26, forces the disks 23 and 28 into frictional engagement through the leather 29, and thus clutches the power-sheave 32 to the shaft 20. To limit the movement of the power-sheave in the opposite direction, a stop 33 is properly, set on the shaft 20, being fitted to the squared bearing 20' thereof, the sheave hav ing a pin or boss 34 fixed thereto, which is adapted to be engaged by the lug 35of the stop. The periphery of the clutch-wheel, within which lies the clutch-disk 23, has thereon the teeth 37, which. engage with the teeth 38 on a pinion 39, the respective teeth being so inclined and. formed that they run together freely in revolving in the directions of the arrows thereon and interlock in the re- The movement of verse action to prevent revolution in the op posite directions. The pinion 39 is journaled on a bearing 40, carried by an arm 41, the arm having a hub 42, which is journaled on the extended bearing 9. The arm has a limited rocking movement, its outer part 43 making contact with a shoulder or stop 44, formed in the frame member 2 when the clutching-gears are moving in the direction of the arrows, and when interlocked by the reverse action the pinion 39 is carried into engagement with the stop or dog 45, fixed to the frame member. As the dog is constructed so as to engage the respective teeth 38, when so engaged the pinion 39 is thereby held against rotation reversely to the direction of the arrow thereon and the strain is relieved between the point of the tooth 37 and the crown of the tooth 38,which engage the gears in interlocking relation.

In hoisting, the hand-chain 32 is drawn down to revolve the power-sheave 32 inwardly on the worm 30, causing the hub 31 to jam the hub 26 and the disk 28 to clutch the disk 23, whereby the power-sheave is fixed to the shaft 20 and the latter revolved. The revolution of the shaft 20 and the pinion 18, fixed thereon, revolves the spur-wheels 17 and the pinions 12, the latter revolving the spurwheel 10 and the sheave 5 to lift the load carried by the chain 5. Upon withdrawing the power from the hand-chain 32 the load on the chain 5 acts to revolve the load-sheave, the gear-train, and the shaft in the reverse direction, whereby the screw 30 acts to draw the power-wheel hub 31 against the clutch-wheelhub 26 and hold the disks 23 and 28 in frictional engagement. As the clutch-wheel is held by the interlocking of its teeth 37 with the teeth 38 of the clutch-pinion, the load is held stationary until elevated in the manner already described or lowered by revolving the'power-wheel outwardly on the worm, so as to relieve the pressure between the friction-disks and permit the load to run down. The rate of lowering of the load is regulated to the speed of the power sheave by the action of the load in feeding the screw through the sheave to tighten the clutching-disks, and the reversal of the powersheave, so as to drop or too rapidlylower the load, is prevented by the limiting action due to the engagement of the boss 34 with the lug 35.

Having claim 1. A hoisting mechanism comprising a sheave, an externally toothed spur wheel fixed to said sheave, a shaft extending through and revolving in said sheave and wheel, a pinion fixed to said shaft, a spurwheel engaging the pinion fixed to said shaft, and a pinion fixed to said last-named spurwheel and engaging said first-named spurwheel, substantially as specified.

described our invention, we

2. A hoisting mechanism comprising a frame, a sheave having hubs journaled in said frame, an externally-toothed gear-wheel fixed to one of said hubs, a shaft extending through and journaled in said sheave, a gearwheel fixed to said shaft, and a pair of gearwheels fixed together and engaging the respective gear-wheels fixed to said hub and shaft, said pair of gearwheels having an axis of rotation stationary with reference to said frame, substantially as specified.

3. A hoisting mechanism comprising a pair of frame members, a revoluble sheave carried by said frame members, an externally-toothed gear-wheel fixed to and revolving with said sheave, a shaft passing through and revolving in said sheave and gear-wheel, a gear-wheel fixed to said shaft, a pair of gear-wheels fixed together and engaging respectively the gear-wheels fixed to said sheave and shaft, an incasing member coacting with one of said frame members to inclose said gear-wheels, and bearings for said pair of gear-wheels in said last-named frame and incasing members, substantially as specified.

4. A hoisting mechanism comprising a sheave, a ournal fixed to said sheave, an externallytoothed gearwheel fixed to said journal, a frame member having a bearing for said journal between said sheave and wheel, a casing member joined to said frame member, a shaft passing through and revoluble in said sheave, journal and gear wheels, said shaft having a bearing in said casing member, a gear-wheel fixed on said shaft, and a plurality of pairs of gear-wheels supported by bearings on said frame and casing members, the gear-wheels of each pair engaging respectively the gear-wheels fixed to said journal and shaft, substantially as specified.

5. A hoisting mechanism comprising a frame member having a bearing, a loadsheave having a hub journaled in said bearing, a shaft passing through and revoluble in said sheave and hub, a clutch member having a sleeve with a screw thereon fixed on said shaft, a clutch member having a hub journaled on said sleeve, a casing member having a bearing in which said clutch-member hub is journaled, a power-sheave engaging said screw and clutch-hub, and gearing connecting said shaft and load-sheave, substantially as specified.

6. A hoisting mechanism comprising a frame member having a bearing, a load sheave having a hub journaled in said bearing, a shaft passing through and revoluble in said sheave, a frictional clutching-disk having a sleeve with a screw thereon fixed to said shaft, a toothed clutching wheel on said sleeve and having a frictional member coacting with said frictional disk, a power-sheave engaging with said screw for moving said clutching-wheel on said sheave, an arm carried by and oscillating on the bearing of said frame member, a toothed wheel carried by said arm and engaging the teeth of said clutching-Wheel, and a dog for engagin the wheel carried by said arm, substantially as specified.

7. A hoisting mechanism comprising a frame member having a bearing, a lifting sheave revolubly supported by said bearing, a revoluble shaft journaled in said sheave, gearing connecting said shaft and sheave, an arm rocking on said bearing, a wheel carried by said rocking arm, a second wheel adapted to be en aged and held by said first wheel, and mechanism for holding said first wheel, substantially as specified.

8. A hoisting mechanism comprisin a frame member having a bearing eXten ing therefrom, a load-sheave journaled in said bearing, a shaft journaled in said sheave, gearing connecting said shaft and sheave, an arm rocking on said bearing, a revoluble pinion carried by said arm, a revoluble gearwheel engaged by said pinion, a stop on said frame member for limiting the movement of said arm in one direction, and a dog on said frame member for engaging and holding said pinion when said arm is moved in the opposite direction, substantially as specified.

9. A hoisting mechanism comprising a frame, a load-sheave revolubly supported by said frame, a shaft journaled in said sheave, mechanism whereby said shaft operates said sheave, a frictional disk fixed to said shaft, a Wheel revoluble relatively to said disk and having a frictional member coacting therewith, said Wheel having inclined teeth thereon, a rocking arm, a pinion journaled on said rocking arm, and oscillating in a circle concentric with said wheel, said pinion having inclined teeth which roll in one direction and interlock in the other direction With the teeth on said Wheel, and a dog for engaging said pinion, substantially as specified.

In testimony whereof we have hereunto set our hands, this 7th day of December, 1904, in the presence of the subscribing Witnesses.

ROBT. F. SCOTT. PETER MULLEN.

Witnesses:

ROBERT JAMES EARLEY, UTLEY E. CRANE, Jr. 

